Optim纤维的物理性能研究

Study on the Physical Properties of Optim Wool Fibres

Optim纤维是一种经过特殊拉伸和定型的羊毛纤维 ,由澳大利亚联邦科学院羊毛所研制。由于其性能特殊 ,已与原来的羊毛纤维存在很大差异。系列物理形态特性的测量 ,表征和解释给出了该纤维的特征和相互关系。

The testing conditions of a fibre bundle tensile tester (TENSOR) are elongation speed (ES), gauge length (GL), pretension, jaw pressure, environmental temperature and relative humidity, instrument linearity and sensitivity. The effects on fibre-bundle tensile properties at different GL and ES have been discussed in detail and compared with Peirce's theories on the weaklinks and the breaking time effect. The experimental results indicate that the tensile properties of fibre bundles are strongly affected by GL and vary with different GL. The reasonable GL should be 5 15 mm rather than 3.2 mm for wool bundle measurements. The ES ranging from 20 mm/min to 40 mm/min is beneficial for obtaining comparatively stable and accurate tensile values, whereas 20 mm/min used in current testing for wool fibre bundles is at the lower limit of the suggested range. For bundle modulus measurement, the sampling interval must be selected appropriately. The new calculation of the sampling interval has been established.